Cam Follower Shim by SupertechBy placing a valve shim in any out-of-tolerance valve spring location, all cylinders are able to receive and exhaust the same amount of material. Many engine builders consider the valve shim to be an invaluable tool when tunin
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By placing a valve shim in any out-of-tolerance valve spring location, all cylinders are able to receive and exhaust the same amount of material. Many engine builders consider the valve shim to be an invaluable tool when tuning a performance engine.
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